<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>9.关于访问数据</title>
  </head>
  <body>
    <script type="text/javascript" >
      let obj = {arr:[1,3,5,7]}

      console.log('之前的',obj)

      debugger;
      obj.arr[0] = 100
      debugger;

      console.log('之后的',obj)
      debugger;
      console.log(6)

    </script>
  </body>
</html>